Part of our purpose, our "savor" is to be a light and an under-shepherd with Christ.

Elder Gibbons

https://www.churchofjesuschrist.org/study/general-conference/2006/10/wherefore-settle-this-in-your-hearts?lang=eng

Pres. Monson

https://www.churchofjesuschrist.org/prophets-and-apostles/unto-all-the-world/become-a-light-for-all-to-see?lang=eng

Pres. Benson

https://www.churchofjesuschrist.org/study/general-conference/1978/04/may-the-kingdom-of-god-go-forth?lang=eng